Composites of nanotubular polyaniline containing Fe3O4 nanoparticles
Long Yun-Ze (龙云泽)a, Chen Zhao-Jia (陈兆甲)a, Liu Zhen-Xing (刘振兴)a, Zhang Zhi-Ming (张志明)b, Wan Mei-Xiang (万梅香)b, Wang Nan-Lin (王楠林)a
a Laboratory of Extreme Condition Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China; b Organic Solid Laboratory, Centre for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China
Abstract Results of charge-transport and magnetic measurements of nanotubular polyaniline (PANI) composites containing Fe3O4 nanoparticles (~10nm) synthesized by a "template-free" method are reported. The T -1/2 resistivity has been observed, and dc magnetic susceptibility data are fitted to an equation $\chi=\chi_P^*+C/T$. With increasing weight ratio of Fe3O4, the electrical conductivity and temperature- independent susceptibility $\chi_P^*$ increase, and the Curie-type susceptibility is suppressed at low temperatures. Further discussions have been given. The PANI-H3PO4/Fe3O4 composite containing 27wt% of Fe3O4 nanoparticles is superparamagnetic, exhibiting very little hysteresis even at 5K.
Received: 23 September 2002
Revised: 04 December 2002
Accepted manuscript online:
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos 50133010 and 29974037).
Cite this article:
Long Yun-Ze (龙云泽), Chen Zhao-Jia (陈兆甲), Liu Zhen-Xing (刘振兴), Zhang Zhi-Ming (张志明), Wan Mei-Xiang (万梅香), Wang Nan-Lin (王楠林) Composites of nanotubular polyaniline containing Fe3O4 nanoparticles 2003 Chinese Physics 12 433
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.